By Jim Harrison

The measurement of AC and DC currents seems to be getting
more important all the time. Low ohm current sense resistors offer the easiest
and most reliable way to perform this task. A major factor driving the demand for this type of product is the growth
of battery powered equipment.

series of SMT thin film resistors from TT Electronics feature power ratings
from 0.1 to 1.0 W in 0603, 0805, 1206, 1210, and 2512 packages. Values
range from 100 mΩ to 1.00 Ω
with tolerances of 0.5, 1, and 5%. The 0603 and 0805 sizes start at 200 mΩ.


The resistors
exhibit a TCR of ±50 ppm for values greater than 0.30 Ω.
Their temperature range is -55° to 155°C and power is derated from 70°C. An
example part number is LCS1210-R20F. The devices are priced as low as
$0.01 ea/10,000 and samples are available now.